Briggs & Stratton — Checking Thermostat
Testing & diagnosis
From a Briggs & Stratton service manual — check it applies to your exact model before use.
Browse Briggs & Stratton generators & specs →
Procedure
- Check to make sure thermostat valve is fully closed.
- Immerse thermostat in water and heat water gradually.
- Note temperature when thermostat starts to open: 81 — 84 degrees C (178 — 183 degrees F).
- Note temperature when thermostat is fully open: 95 degrees C (203 degrees F).
- Remove thermostat from water and allow to cool; thermostat should close fully.
Tools required
- Thermometer capable of reading 100 degrees C (210 degrees F) or more Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Starts to open 81 — 84 degrees C (178 — 183 degrees F)
- Fully open 95 degrees C (203 degrees F)
Source: Briggs & Stratton service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.